Originally Posted by
vbroucek
You should never ever change to pyjamas (or even take your shoes off) before the pushback. Many airlines will not even let you do so for the safety reasons (evacuation).
I have never heard of an airline not allowing pax to change before takeoff due to safety concerns. When I fly QF I always change in to the PJs before take off but keep my shoes on and passport/wallet handy until we are safely in the air. In the event of an emergency during take off resulting in a slide evacuation I have far bigger concerns than if I am wearing jeans or pyjamas.